Abstract
Photochemical activity of isolated mesophyll chloroplasts was measured as Hill reaction activity (HRA) and photosystem 1 (PS1) activity in three diallel crosses of maize (Zea mays L.) inbred lines and F1 hybrids. Statistically significant differences between genotypes together with positive heterotic effect in F1 generation were found for both traits studied. These differences were more pronounced when HRA or PS1 activity was expressed per leaf area unit or dry matter unit compared to the expression per chlorophyll content unit. Analysis of variance showed that both the genetic and non-genetic components of variation in the photochemical activity of isolated mesophyll chloroplasts are present in all three diallel crosses examined. The positive heterosis in F1 hybrids probably arises from non-additive genetic effects of a positive dominance type. Additive genetic effects were also statistically highly significant. We found no differences between reciprocal crosses.
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Claims 7
Claim · model-written summary
Maize genotypes differed significantly in Hill reaction activity and showed positive F1 heterosis.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photochemical activity of isolated mesophyll chloroplasts was measured as Hill reaction activity (HRA) and photosystem 1 (PS1) activity in three diallel crosses of maize (Zea mays L.) inbred lines and F1 hybrids. Statistically significant differences between genotypes together with positive heterotic effect in F1 generation were found for both traits studied.”
t0“maize (Zea mays L.)”
Claim · model-written summary
Maize genotypes differed significantly in photosystem 1 activity and showed positive F1 heterosis.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photochemical activity of isolated mesophyll chloroplasts was measured as Hill reaction activity (HRA) and photosystem 1 (PS1) activity in three diallel crosses of maize (Zea mays L.) inbred lines and F1 hybrids. Statistically significant differences between genotypes together with positive heterotic effect in F1 generation were found for both traits studied.”
t0“maize (Zea mays L.)”
Claim · model-written summary
Genotype differences in chloroplast activity were more pronounced per leaf area or dry matter than per chlorophyll content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These differences were more pronounced when HRA or PS1 activity was expressed per leaf area unit or dry matter unit compared to the expression per chlorophyll content unit.”
t0“maize (Zea mays L.)”
Claim · model-written summary
Genetic and non-genetic components of variation in photochemical activity were present in all three maize diallel crosses.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both the genetic and non-genetic components of variation in the photochemical activity of isolated mesophyll chloroplasts are present in all three diallel crosses examined.”
t0“maize (Zea mays L.)”
Claim · model-written summary
Positive F1 heterosis probably arises from positive dominance non-additive effects.
- Material
- F1 hybridse0
- Outcome
- positive heterosise0
- Qualifier
- non-additive genetic effects of a positive dominance typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive heterosis in F1 hybrids probably arises from non-additive genetic effects of a positive dominance type.”
t0“maize (Zea mays L.)”
Claim · model-written summary
Additive genetic effects were highly significant.
- Outcome
- Additive genetic effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additive genetic effects were also statistically highly significant.”
t0“maize (Zea mays L.)”
Claim · model-written summary
Reciprocal maize crosses did not differ.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We found no differences between reciprocal crosses.”
t0“maize (Zea mays L.)”